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Increased fuel mileage with solid bed cover

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Old Aug 17, 2008 | 02:37 PM
  #1  
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Increased fuel mileage with solid bed cover

I bought a bed cover, have been trying to buy one for a while and finally had the time to look into it. I have seen arguments pro and con on the issue of better mpg with a solid bed cover, so I did my own brief test. I have found an increase of 1.5 mpg over 2 trips averaging 4 fillups per trip.

The manufacturer included a flyer touting the fact that the cover will pay for itself in better fuel mileage over time. While I didn't take that seriously initially, I am starting to consider it a possibility. If my results continue, it would pay for itself in a year basically.

The bottom line is I needed the bed cover, so I have met that goal, if I get better fuel mileage, even better.

Anyone else have any experience with this issue?
 
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Old Aug 17, 2008 | 03:16 PM
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Herd the same thing. IMO anything aftermarket promisses a add in MPG. Kinda stopped taking them seriously a long time. But hey of your getting 1.5MPG better then hey, they told the truth.
 
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Old Aug 17, 2008 | 04:05 PM
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Try to find the Myth Busters episode they did on this subject, I think they found no difference in milage.
 
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Old Aug 17, 2008 | 05:07 PM
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Hank85713
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Diesel power did a report on an 04 and got the biggest gain by going to a bed cover. I know some folks that also claim an improvement in their milage.

They are now saying to go to a lighter cover to lessen the weight added! Just keep checking the milage and let all know if it holds up.
 
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Old Aug 17, 2008 | 07:03 PM
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Originally Posted by wb6anp
Try to find the Myth Busters episode they did on this subject, I think they found no difference in milage.
They actually did 2 separate tests... They were flooded with mail after the first test and then they did a "myth revisited" episode. Their test was with a chev gas pick-up with 4 different variables:
1) Tailgate up
2) Tailgate down
3) Bed cover
4) Mesh net (no tailgate)

Their results indicated the best mileage was the stock tailgate removed and with a mesh net tailgate. I'm of the opinion a diesel powered vehicle would probably have different results. I have found with my tailgate down my highway mpg increases about .6 mpg although it looks (bad) like I accidentally left the tailgate down.

I think Myth busters should have included a mpg test without a windshield
 
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Old Aug 17, 2008 | 07:23 PM
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I know my milage goes up abt 1 mpg when I had my camper shell off.
 
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Old Aug 17, 2008 | 08:17 PM
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Thanks for the replies. I am trying to eliminate my driving as a factor, some of these 2 trips were more heavily weighted through lower speed limit areas, going 70ish rather than 80ish. I will update as I get more data.
 
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Old Aug 17, 2008 | 10:00 PM
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I've been hesitant on getting one. The only problem is I have a transfer tank. They have the ones that fold into sections but they fold from the tailgate back. Maybe I could put it on backwards?
 
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Old Aug 18, 2008 | 09:44 AM
  #9  
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I have an ARE fiberglass cover. It cuts down on wind resistance considerably.
 
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Old Aug 18, 2008 | 10:44 AM
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I don't like the looks of them, so that solves it for me. As to the debate whether they help or not, it depends on a lot of factors including length of cab and length of box. Trucks with shorter cabs and longer boxes tend to benefit whereas longer cabs which shorter boxes don't because the pocket of air behind the cab fills the entire bed area.

I have backup sensors, so if I try leaving my tailgate down it annoys the s*** out of me
 
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Old Aug 18, 2008 | 07:26 PM
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I have a tool box in the bed of mine...so that kinda shoots the idea in the buttocks.

I've gotten (recently) a PM from one of the sponsors claiming their cover will pay for itself in fuel savings too.

Joe
 
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Old Aug 18, 2008 | 09:13 PM
  #12  
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Originally Posted by msgtg
I have a tool box in the bed of mine...so that kinda shoots the idea in the buttocks.

I've gotten (recently) a PM from one of the sponsors claiming their cover will pay for itself in fuel savings too.

Joe
Most everyone sells tonneau covers that will fit with a toolbox the problem I have is that they only make them for like 18"+ boxes my transfer tank is only like 8"

I just found this though =D

http://www.truxedo.com/pdf/box-detail-sheet-txlp.pdf

you can custom make one through truxedo which I think are the best looking ones they are extremely low profile
 
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Old Aug 19, 2008 | 12:30 AM
  #13  
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I have a 2004 6.0L Crew Cab Short Box

I installed a Diamondback cover 2 months after purchasing the truck. The cover is still on the truck as we speak.

I have noticed no fuel mileage increase.

For most of 2006 I did not have the cover on the truck due to broken hinges. The cover was placed on the truck once the hinges were replaced by Diamondback in October 2006.

No mileage change noticed with or without the cover.
 
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Old Aug 19, 2008 | 01:58 AM
  #14  
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Long cab, short box, thats one of the cases they don't help.
 
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Old Aug 25, 2008 | 06:54 PM
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Still getting 1.5 mpg better fuel mileage. I will keep posting updates to this, I figure if this keeps up, the cover will pay for itself in 2 years. To me, considerable savings, and it is nice having the cover on. When I have to load something, I just fold it back, no problem.
 
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